diff --git a/deb12/src/Dockerfile.base b/deb12/src/Dockerfile.base
index f84ff47..89ad597 100644
--- a/deb12/src/Dockerfile.base
+++ b/deb12/src/Dockerfile.base
@@ -12,6 +12,7 @@ ENV \
 # mirrors.tencentyun.com
 ARG TARGETPLATFORM
 RUN export DOMAIN="mirrors.ustc.edu.cn"; \
+  rm -f /etc/apt/sources.list.d/debian.sources; \
   test -z "$(echo $TARGETPLATFORM |grep arm)" && target=bookworm || target=bookworm-ports; \
   echo "deb http://$DOMAIN/debian bookworm main contrib non-free" > /etc/apt/sources.list; \
   echo "deb http://$DOMAIN/debian bookworm-updates main contrib non-free">> /etc/apt/sources.list; \